The project is the real unit of isolation

Speaker notes

• Every project has three identifiers: a globally unique, immutable Project ID used in API calls; a mutable display-only Project Name; and an auto-assigned Project Number some Google APIs use internally. Mixing up the immutable ID with the mutable name is a common early confusion.
• A region (like us-central1) is an independent geographic area; a zone (us-central1-a) is an isolated deployment area inside it, typically its own physical facility with independent power and cooling. Not every product ships in every region on day one, verifying product availability by region before designing around it is an explicit exam-guide consideration.
• Deleting a project schedules a 30-day soft-delete window, not instant deletion, a real cost trap if a billing account remains attached to a project with its own independently-billed resources during that window.

Deck map